You could create a dashboard enabler with RFC1918 that just get turned on for policies than need inter LAN communication. (This could be an official one)
As for jumping from policy to policy, I think that what adam:UBA™ - User Assigned Policies is for.
As I understand enablers do have source filtering by changing the “d” to an “s”. Haven’t tried it though.
More info on the enablers by hover-over would be great.